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- 저자 : Yong Taek Oh(오용택) (검색결과 104 건)
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오용택(Yong-Taek Oh),아궁 샴수딘 사라기(Agung. S. Saragih),김정현(Jeong-Hyun Kim),고태조(Tae-Jo Ko) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.3
This paper introduces the kinematic calibration method to improve the positioning accuracy of a parallel mechanism. Since all the actuators in the parallel mechanism are controlled simultaneously toward the target position, the volumetric errors originated from each motion element are too complicated. Therefore, the exact evaluation of the error sources of each motion element and its calibration is very important in terms of volumetric errors. In the calibration processes, the measurement of the errors between commands and trajectories is necessary in advance. To do this, a digitizer was used for the data acquisition in 3 dimensional space rather than arbitrary planar error data. After that, the optimization process that was used for reducing the motion errors were followed. Consequently, Levenberg-Marquart algorithm as well as the error data acquisition method turned out effective for the purpose of the calibration of the parallel mechanism.
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오용택 ( Oh Yong Taek ),김안나 ( An Na Kim ),김상균 ( Sang Kyun Kim ),장현철 ( Jang Hyun Chul ) 대전대학교 한의학연구소 2014 혜화의학회지 Vol.23 No.1
Objectives : Clinical data in traditional medicine, such as Korean medicine, traditional Chinese medicine have a long history of accumulating evidence and these rich data are recorded in classic literature. We have conducted a study of developing an algorithm that support clinical diagnosis with composing both users knowledge and data obtained from literature. In order to define necessary information and required steps in diagnosis procedure, we have established a clinical diagnostic procedure including a step of collecting patients symptoms, a step of determining candidates, a step of diagnostic decisions, a step of deciding of treatment and a step of adjusting medicinal treatment. Methods : Our study have been based on the following premises. 1. Using data obtained from literature contributes to accurate diagnosis 2. Displaying the data before users request contributes to accurate conclusion. Displaying before users request enable users to recognize their overlooking a fact on purpose or not. 3. Checking symptoms that are commonly accompanied with a group of diseases that accompany symptoms appealed by a patient contributes to accurate conclusion. These symptoms are worthy of checking. 4. Comparing more than two candidates contributes to accurate conclusion. Users can compare their accompanied symptoms with patients symptoms and this helps users to make a decision. Results : Based on the above premises, we have developed an literature based algorithm to provide various functions, such as recommending symptoms to check, comparing groups of symptoms, differential diagnosis, recommending medicinal materials to prescribe, and more. Conclusions : By the results of simulation with virtual diagnostic scenario, we concluded this algorithm is useful helping clinician in diagnosis procedure.
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오용택 ( Yong Taek Oh ),이병욱 ( Byung Wook Lee ),김은하 ( Eun Ha Kim ) 대한한의학원전학회(구 대한원전의사학회) 2010 대한한의학원전학회지 Vol.23 No.5
By grouping freshly the virtue terms used in herbal medicine, we are apt to establish the position coordinates of concepts and raise the level of the herbal virtue research in future. As the terms related to the herbal virtue used in herbal medicine are used with the virtue terms mingled with the chief treatable disease terms, it`s hard to use the herbal virtue data only. And though the virtues terms imply many data like medical act data or medical operation data, we can`t use them fully. We sort the terms related to the herbal virtue into the virtue terms and the chief treatable disease terms and acquire many data like medical act data or medical operation data and group the data by same attribute. At this time in the process of classification we establish sort standards inductively, put relations between the attributes in order, out of this result we grasp the actual conditions of the virtue terms used now, and show useful data for herbal virtue research in future. We got the chief treatable disease terms from the ones related to the herbal virtue, acquired a lot of data from the virtue terms and grouped the data by the same attribute. We established a proper standard inductively in the process of classification, put the relations between the attributes in order, grasped the actual conditions of the virtue terms in use at the moment out of the result of the classification and presented the applicable data for the herbal virtue research in future.
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오용택(Yong-Taek Oh),김안나(Anna Kim),김상균(Sang-Kyun Kim),장현철(Hyun Chul Jang) 한국콘텐츠학회 2014 한국콘텐츠학회논문지 Vol.14 No.9
Objectives : The goal of this paper is to enhance the percentage of linkages between an acupuncture point ontology and an acupuncture treatment ontology. Methods : Terms of the effect from acupuncture points and terms of the treatment method from diseases are selected in the ontologies. We have disassembled the terms into minimum meaning units and then linked them again. Results : By linking terms of the effect and terms of the treatment method, the meaninful information on the acupuncture point and treatment ontology is increased. Conclusions : The links between points for acupuncture points and treatment methods for diseases could improve the information in the ontologies. This also enables the knowledge representation for the use of acupuncture points with accompanied symptoms, causes of disease, and treatment methods. 목적 : 경혈, 침구 온톨로지의 연계율을 높이기 위한 연구를 시행하였다. 방법 : 혈성(효능) 용어와 치법 용어를 최소 의미 단위로 분해하여 상호 연계하였다. 결과 : 혈성(효능)과 치법의 연계가 증가함에 따라 경혈, 침구 온톨로지 간 연계성이 증가하였으며, 확장연계되는 프로퍼티의 수와 프로퍼티 간 노드의 수도 증가하였다. 결론 : 혈성(효능) 용어와 치법 용어의 최소 의미 단위로의 연계를 통해 온톨로지의 연계율이 개선되고 이에 따라 온톨로지의 활용성이 제고될 수 있음을 알 수 있었다.
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대표 술어로의 변환을 통한 치법 용어의 본초, 처방의 효능 용어 연계에 관한 연구
오용택 ( Yong Taek Oh ),전병욱 ( Byoung Uk Jeon ),장현철 ( Hyun Chul Jang ),김창석 ( Chang Seok Kim ),김진현 ( Jin Hyun Kim ),김상균 ( Sang Kyun Kim ),송미영 ( Mi Young Song ) 대한한의학원전학회(구 대한원전의사학회) 2011 대한한의학원전학회지 Vol.24 No.5
The medical treatment is process of collecting symptoms, making a diagnosis and treatment for the diagnosis. The remedy and the efficacy are the important hinge that links the diagnosis to the means of medical treatment. Lots of medical data are stored on database or saved as files in these days. The preferential way to find the efficacy related to the remedy is search all efficacy terms match up to the remedy term. To increase the rate of matching remedy terms with efficacy terms, we study the relation between efficacy terms and remedy terms and research the conversion way of the terms into the representative terms. The rate of matching the raw remedy terms with the raw efficacy terms is below 30%. The rate of matching the disaggregate remedy terms with the disaggregate efficacy terms is about 50%. The rate of matching the representative remedy terms with the representative efficacy terms is almost 70%.
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유도전동기 부하를 고려한 배전계통의 전압저하(sag)특성
오용택(Yong-Taek Oh),김진성(Jin-Sung Kim) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
The calculation of depth and duration of a sag is in both methods based on two simple assumptions. One is that due to the short circuit, the voltage drops to a low value immediately magnitude. Another is that when the fault is cleared. the voltage recovers immediately. These assumptions, however, do not hold in the case of a substantial part of the load consisting of electrical motors like in many industrial power systems. During the short circuit, the motors will slow down. Their reacceleration after the fault will increase the load current and thus prolong the voltage sag. This paper will discuss some of the aspects of the influence of induction motors on voltage sags.
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